Preheat your oven to 375 degrees.
Cut your cauliflower into small florets. Keep the size as uniform as possible to ensure even baking.
Place on baking sheet (lined in foil or parchment for easy clean-up) and toss with olive oil.
Season with your preferred Ranch dressing packet. (I use 1 full tablespoon and 2 teaspoons, but feel free to adjust according to your preferences!)
Roast for 25-35 minutes, tossing halfway through.
When the florets begin to show a golden brown edge and become soft, remove from oven.
Top with fresh grated parmesan cheese.
Add more or less seasoning to your preference.
Line your pan for the easiest clean-up.